Pneumatic hydrostatic system.



A. ROSZKOWSKI.

PNEUMATIC HYDROSTATIC SYSTEM.

APPLICATION FlLED APR. 1?. I812- RENEWED DEC. H. 1916.

Patented Sept. 18, 1917.

ADOLPH noszxowsxr, or rnrnoennn, RUSSIA.

PNEUMATIC HYDROSTATIC SYSTEM,

Patented Sept. 18, 191" Application filed April 17, 1912, Serial No. 691,399. Renewed December 11, 1916. Serial No. 136,370.

To all whom it may concern:

Be it known that I, AooLrH RoszxowsKI, a subject of the Czar of Russia, and residing at Petrograd, Russia, have invented certain new and useful Improvements in Pneumatic .i lydrostatic Systems, of which the follow- .ing is a specification.

My invention relates to a pneumatic water supply system,v and a primary object is to provide a system comprising reservoirsv at the supply stations directly connected to the pressure mains, said reservoirs having water spaces connected with the pressure mains led from the pump and having air spaces connected one with another by a common pipe, in which automatic outwardly closing valves are provided just beyond the pipe connections to the reservoirs, in order that when water is drawn 0d at one station the air is prevented from flowing out of the contiguous reservoirs.

One embodiment'ot' my invention is diagrammatically illustrated by 'way of example in the accompanying drawing.

Referring to the drawing, 1 designates the pump, 2 the suction pipe, and 3 the pressure pipe.

In the illustrative embodiment three supply stations designated I, II and III are shown. At each of these stations there is a reservoir 4, to which the pressure main 3 is connected. At station I there is also an air chamber 5 which serves as an auxiliary to the air space in the reservoir 4:. The water supply pipes .6 are also connected to the pressure main 3, and water is supplied by opening the cooks 7.

At station I the reservoir 4t and the air chamber 5 are connected by a pipe 8 which opens into the reservoir at 10. An automatic valve 11 is located between the reservoir 4 and the pressure main 3. The air spaces of the reservoirs of the supply stations I, II, III are connected by means of the pipe 9, in which an automatic outwardlyclosing valve 12 is inserted just beyond the connection of the pipe to each reservoir. This pipe 9 is also provided with a closed air supply-opening at 13, which is capable of being opened for admitting compressed air when insufficient air is present.

The pipe 9, instead of being connected to the pipe 8 as at station I, may be connected to the chamber 5, as shown at station III.

My improved pneumatic water supply system operates as follows:

The reservoirs at the various stations are first filled by the hydraulic pump 1 to such an extent that there is sufficient in each for the days requirements.

Now it the cock 7 at station I, for ex ample, is opened, the water flowing outward through the supply pipe (3 principally comes from the reservoir at this station. Although the water spaces of the reservoirs are con nected together by the pipe 3, under the circumstances the supply of water will chiefly come from the reservoir'at station I. Consequently, the air in this reservoir will expand and the pressure at this station will be reduced more than at the other supply stations II and III. There is therefore a tendency for air to flow through the piping 9 from the reservoirs at stations II and III into that of station I. Pressure is thus exerted on the valve 12 which can only open inwardly and this valve is closed owing to the greater pressure prevailing on its inner side. There is a growing difference of pressure at the station I as compared with that at the other stations when water is drawn off from this station, and this difierence of pressure causes the water to flow from the other stations through the pipe 3 toward the supply station I. As soon as water ceases to be drawn ofi. the water at all the stations comes to the same level, because the pressure difi'erences are gradually eliminated. The valves 12 are released and the whole system returns to its originalcondition.

The valves 12 close outward as stated; under the normal condition of the installation they are open, whereby easy access to the pipe 9 is given to the air. This occurs when the pressure exerted by the air is not sufficiently great to close the valve 12, but is sufficient to bring about an equality in the quantity of air within the apparatus at each station.

In addition, the valve 12 prevents air escaping from the apparatus in case of injury to the pipe 9. The valve 12 operates in the same manner when the air is discharged at one of the stations.

This arrangement of water supply stations on the plots of land to be provided with water has the following advantages:

1. The erection of a receiving reservoir, which appeared to be unavoidable in such plants known heretofore, is here dispensed with. The result is that the supply pipes 6 and the reservoirs 4: can be directly connected to the pressure mains 3. This again has the advantage that the size of the main 3 canbe'calculated according to the velocity of the Water delivered by the apuinpwvhich results in a smaller diameter of pipe. Only the short portions of thispipe which are between the reservoirs and the discharge places must be designed corresponding tothe velocity of the discharged Water.

2. the chief discharge points are 'p'rincipally'fed from contiguous reservoirs; ater can be simultaneously 1 drawn ofi atdifi'erent' points without the velocity of thedischarged Water beii g reduced on that account. This 'hoivevei'" is also the 'casewlienthe Wat'er'is supplied from one centr'al reservoir.

"3. Thereinoval ofIa dischargepoint' far ther' from the pumphas no influence on the velocity of" the discharged Water, because a reservoir may be erected in" the vicinity of this point'l- I v I 4. The result of installing the reservoirs 4 near tlie'discharg'epoints is that the plant is protected from hydraulic shocks, Which could otherwise o'ccur'on the cock 7 being closed; because the force of such shocks is reduced owing to the very sinall quantity of Water" present between the reservoir and the discharge point. t

5;; The readjustment of the Water to the same level in the different reservoirs during and after the discharge takes place in a very short time, as this equalization is brought about not only by the pressure of the Water, but also by] the difference in air pressure. This circumstance allows Water to be still discharged at' one of the supply stations, even When the reservoir there" has already beenem tied; because the inflo'vv' from' th e' other reservoirs takes place sufficiently quickly. I

6i Injury'to'th'e pipe 9 or the discharge of cbpiesor'tins'patefifmaybe-untamed air are cents e the airfrom one of the, reservoirs does not put the whole system out of operation.

7. Finally, a further advantage of the new systern-is that the reservoirs under pressure can be erected at various points in the disniatic clieck-valiv'esfor the air connections of theseveral tanks, said check valves opening teward said tanks.

25 A pneumatiewater supply system C0111- pr'ising a plurality" of 'Water tanks spaced apart, ii -plurality of air tanksseverally' disposed adjacentto said Water tank's, a commoirwater' supply pipe, independent con ne'et'i'ons bettveensaid common" supply pipe and said Water tanks, valved discharge pipes connected" with said connnon Water pipe adjacent to said Water tanks, pipes connecting said Water and air ta'nlis inpairs', a common air supply pipe; independent connections be tween said air pipe and said" air tanks and checkvalves for said connections fop'ening toward said air tanks;

I11 testimony, that I claim the foregoing as invention; I havesigrnedmy name in presence of two"subscribingWitnesses; t I A DOL'PH RO'SZKOWVSKI. Witnesses": v r v JAMES" CUTED; JAMns Hmm'DbeeL;

mi, 5y ,saarmiimhircommissioner): Patents; 

